diff options
Diffstat (limited to 'source/blender/blenkernel/intern/armature.c')
| -rw-r--r-- | source/blender/blenkernel/intern/armature.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/source/blender/blenkernel/intern/armature.c b/source/blender/blenkernel/intern/armature.c index 15116b390cc..f5d8edef167 100644 --- a/source/blender/blenkernel/intern/armature.c +++ b/source/blender/blenkernel/intern/armature.c @@ -809,7 +809,22 @@ void get_objectspace_bone_matrix (struct Bone* bone, float M_accumulatedMatrix[] pose_mat(b)= arm_mat(b) * chan_mat(b) *************************************************************************** */ +/* Computes vector and roll based on a rotation. "mat" must + contain only a rotation, and no scaling. */ +void mat3_to_vec_roll(float mat[][3], float *vec, float *roll) { + if (vec) + VecCopyf(vec, mat[1]); + if (roll) { + float vecmat[3][3], vecmatinv[3][3], rollmat[3][3]; + + vec_roll_to_mat3(mat[1], 0.0f, vecmat); + Mat3Inv(vecmatinv, vecmat); + Mat3MulMat3(rollmat, vecmatinv, mat); + + *roll= atan2(rollmat[2][0], rollmat[2][2]); + } +} /* Calculates the rest matrix of a bone based On its vector and a roll around that vector */ |